package com.gk.study.service;

import com.gk.study.mapper.TeacherMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.math.BigDecimal;

/*
 * 财务管理
 */
@Service
public interface TeacherService {
    BigDecimal getTotalIncome(Long userId);
}
